DE102015004795A1 - Filter device and filter element - Google Patents

Abstract

A filter device, in particular provided for installation in a fluid storage tank with at least one, preferably exchangeable filter element (18) whose element material (20) can be traversed from inside to outside in the radial direction by a fluid, the support tube (36) comprising a passage openings ), which in each case while maintaining a predeterminable radial distance and forming a fluid flow space is surrounded by a housing wall of a housing having a plurality of passages, is characterized in that at least a part of the passage openings in the support tube (36) of the filter element (18) Flow guide (80), which give the fluid a flow direction which is different from the radial flow direction.

Description

The invention relates to a filter device, in particular provided for installation in a fluid storage tank with at least one, preferably exchangeable filter element, the element material is viewed in the radial direction from the inside to the outside of a fluid can flow, which is comprised of a passage openings comprising support tube, respectively While maintaining a predetermined radial distance and to form a fluid flow space is surrounded by a housing wall having a plurality of passage points. The invention further relates to a filter element, in particular provided for a pertinent filter device.

In the filtration with this Intank filter devices occurs at high working pressures and / or large amounts of fluid in the passage of the fluid to be cleaned through the filter element for spraying and foaming; The latter is caused by gas, in particular air bubbles, which can pass into the fluid, in particular in the form of hydraulic oil, in the hydraulic working group preceding the fluid storage tank. A pertinent foaming in the fluid occurs in particular when pertinent filter devices for mobile machines are used, such as excavators, wheeled or telescopic loaders, etc., which are provided with a corresponding working hydraulics, for example in the form of controllable by means of pumps hydraulic cylinder and can be supplied. In order to avoid that in the known solutions, the spurting out of the filter element and foam-forming fluid comes into direct contact with the other fluid or oil quantity in the storage tank, the filter elements are chambered in corresponding Umfassungsgehäusen within the tank, each forming a kind Vorreßigungsraum or prechamber in which the cleaned fluid can come to rest and any gas bubbles can escape upward due to buoyancy. However, the said calming chambers take up a relatively large amount of installation space within the actual tank volume and ultimately lead to large-scale storage tanks as a whole, and especially at the mentioned high working pressures and / or very large amounts of fluid to be filtered, the pre-chamber volumes do not regularly suffice Measures to bring a calming of the oil and air outlet before delivery in the actual storage tank to accomplish.

It also comes in the context of modern downsizing in such mobile machines while maintaining the performance of the hydraulic system to an inevitable reduction of technical equipment parts such as the tank volumes, so that the entry and settling times for the fluid in the tank inevitably decrease, which in turn increased Foaming is associated.

In order to counteract the foaming that has occurred, solutions have already been proposed in the prior art, for example in the form of EP 2 249 941 B1 , Which relates to a generic design filter device and filter element. In this known solution, the plurality of passage points of the housing wall are partially disposed below a respective variable fluid level in the storage tank and the other part of the passage points above this fluid level. Due to the fact that, in the known solution, the respective passage points are furthermore part of at least one screen or lattice structure covering the window-like passage regions arranged in the housing wall, and the free opening cross-sections for the passages of the housing wall are selected such that any located in the cleaned fluid Gas bubbles are deposited on the thus perforated housing wall and / or collectable for a fluidniveaunahe discharge flows into the fluid flow space entering, purified from the respective element material fluid in the region of the respective fluid level and above it in a laminar manner on the assignable passages in the storage tank, and the unwanted spray or foaming when exiting into the storage tank fluid is avoided with certainty.

Due to the pressure difference between the inflowing, unpurified fluid and the effluent, purified fluid latter can be raised in the fluid flow space above the fluid level in the tank with even distribution along the inside of the housing wall with the passage points, which can contribute to capillary effects, and the resulting uniform fluid film then allows the splash and foam-free outlet from the said passageways transverse to the housing wall.

For the known filter device, a filter element is preferably used interchangeably, in which a pleated element material for the removal of particulate contamination from the fluid extends between two end caps, said element material being comprised of a support tube which, to increase the pressure stability of the element material supported to the outside, and the pertinent supporting shell has corresponding passage openings in the form of a perforation, which allows the fluid from the inside to the outside first passes through the element material and then the support tube of the filter element in the radial outlet direction.

Based on the above-mentioned prior art, the invention has the object based on the known solution to further improve that an increased air discharge from the fluid, especially in the form of hydraulic medium, is created in a fluid storage tank. This object is achieved by a filter device with the features of claim 1 in its entirety and a filter element with the feature configuration of the further independent claim 10.

The fact that according to the characterizing part of claim 1, at least a portion of the passage openings in the support tube of the filter element has a flow guide, which give the fluid a flow direction which is different from the radial flow direction through the filter element, there is an improved removal of air fractions also in the form of bubbles from the fluid to be filtered, in particular in the form of hydraulic oil. Furthermore, the coalescence capability for the air bubbles or air droplets within the fluid, which combine to form larger bubbles or drops due to their surface tension, is increased via the respective flow guide, which in turn improves the delivery of the thus collected air from the fluid to the air due to its buoyancy Enables environment by the air discharge over the respective fluid level into the overlying air space of the fluid storage tank takes place informally.

Furthermore, due to the directed fluid flow, due to the respective flow guide, there is no short circuit in front of and behind the support tube, but rather it is ensured that the quantities of air present between the outside of the pleated element material and the inside facing the support tube are defined via the flow guide device can also be submitted. Also, in the region of the respective flow-guiding device and its respective discharge opening in the form of free opening cross-sections, an acceleration of the fluid can occur, with onset of swirling flow around the filter element with support tube, so that increased and improved air discharge can take place from the fluid. It has proved to be advantageous to direct the swirl flow in the counterclockwise direction around the filter element, wherein preferably all Strömungsleiteinrichtungen have to point with their free opening cross-sections in a common direction, so as not to hinder the air outlet by unwanted turbulence from the fluid medium. But there is also the possibility, the twist direction reversed, ie clockwise to choose.

It has also proven to be particularly advantageous if the respective flow-guiding device of the support tube limits the associated free opening cross-section such that it is about 10 ° to 80 °, preferably about 30 ° to 60 °, particularly preferably about 45, with respect to the longitudinal axis of the filter element °, which has a favorable effect on the swirl flow to be achieved around the filter element around.

The respective flow guide is formed from the material of the support tube and formed outwardly above as a flow pocket whose upper edge limits the opening cross section for the fluid delivery of the flow. Thus, the flow guide pocket-like from the support tube shell from the inside out pronounced, punched or cut, which allows a particularly cost-effective production of the support tube and thus the filter element as a whole.

In a particularly preferred embodiment of the filter device according to the invention, in addition to the respective flow-guiding device, the support tube has further passage openings which, in groups, comprise the respective flow-guiding device. In this case, the sum of the free opening cross-sections of the flow-guiding devices is preferably smaller than that of the passage openings in the support tube. While the flow directing devices with their free opening cross sections cause the swirling flows around the filter element, the other passage openings in the manner of a perforation in the support tube continue to cause the fluid to pass through the support tube in the radial direction from inside to outside, which causes undesired pressure increases in the interior avoiding the support tube, which could otherwise possibly interfere with the free filtration of the pleated element material. Furthermore, it has proven to be advantageous to group both the flow guiding devices of the support tube and the other radial passage openings in groups and at defined distances from each other around the support tube.

The subject matter is also a filter element, in particular provided for a pertinent filter device, with an element material extending between two end caps, which is surrounded by a support tube with passage openings, whereby improved air discharge values can be achieved with this filter element, if at least some of the passage openings in the support tube of the said filter element having a flow guide, which give the fluid a flow direction which is different from the radial flow direction through the support tube.

In the following, the solution according to the invention will be explained in more detail with reference to various embodiments according to the drawing. This show in principle and not to scale the

1 a longitudinal section through an embodiment of the prior art;

2 In a partially cutaway view, another embodiment of the filter device according to the prior art is shown, however, as far as possible according to the embodiment of FIG 1 corresponds;

3 a perspective oblique view of a filter element, as it is for one of the filter devices according to the 1 and 2 Use finds;

4 a plan view of the filter element after the 3 in erected condition;

5 an enlarged partial view of the in 4 fictional circle represented by B;

6 . 6a , b is a plan view of a modified embodiment of a support tube with unwound support tube shell or in the direction of the arrows marked with X and Y each have an end view of the support tube shell after the 6 ; and

7 an enlarged reproduction of the in 6 A circle section marked A

The in the 1 shown in longitudinal section filter device is used for installation in a container-like fluid storage tank 10 , comparable to the installation situation after the EP 2 249 941 B1 , From the fluid storage tank 10 is according to the presentation of the 1 only the upper tank wall 12 drawn, as well as an associated receiving wall 14 for fixing the filter device as a whole. A similar installation situation for filter elements and filter devices is also in the EP 1 419 807 B1 demonstrated. Between the wall sections shown 12 . 14 runs an inlet channel 16 for periodically contaminated with particles fluid, as it comes for example from the hydraulic circuit of a not-shown working hydraulics of a construction machine or the like.

The filter device further comprises a filter element 18 on with preferably pleated filter mat as elemental material 20 ; otherwise the filter element forms 18 essentially a kind of circular hollow cylinder. The element material 20 is between an upper end cap 22 and a lower end cap 24 as parts of the filter element 18 guided. The lower end cap 24 has center and coaxial with the longitudinal axis 26 the filter device extending a per se conventional bypass valve 28 on the elemental mat added by particulate soiling 20 opens and bypasses the element material 20 the fluid unpurified via a lower bypass opening 30 in the storage tank 10 can flow out.

Because the element material 20 is flowed through from the inside to the outside in the radial direction, ie the flow from the inside 32 of the filter element 18 towards the interior 34 of the fluid storage tank 10 is done, is the elemental material 20 for stiffening outward from a jacket-shaped support tube 36 includes, which is also preferably formed circular cylindrical and corresponding passage openings 37 that in the prior art in the manner of a perforation in the support tube 36 are formed (s. 2 ). The pertinent passage openings 37 in the support tube 36 serve the passage of the means of elemental material 20 cleaned-up fluid. A correspondingly shaped support jacket (not shown) could, however, basically also be the outer contour of the pleated element material 20 follow and inasmuch as to increase the pressure stability of the element outwards to make the support. A pending support jacket would then have corresponding passage openings for the fluid medium. The fluid inlet of the unpurified fluid from the inlet channel 16 Coming, via the upper inlet opening 38 of the filter element 18 in the direction of said inside 32 thereof.

The filter element 18 is in as a whole with 40 designated housing received on its upper side a flange-like widening 42 has, with which the filter device in this area at the top of the upper tank wall 12 supported. To the mentioned broadening 42 closes in turn down a cylindrical housing wall 44 on to her bottom 46 is formed pot-shaped closed, except for the said bypass opening 30 , Preferably, the pertinent underside forms in this respect 46 the housing wall 44 an independent bottom part and the housing wall 44 is supported with its free end at a paragraph-like step of the bottom part 46 as well as on the flange-like widening 42 , Thus the described composite of the housing 40 in the in the 1 remain shown assembly position, are the outer peripheral side to the element material 20 with support tube 36 holding rods 48 arranged, of which in the 1 only one stop 48 is shown completely and of the other two used to that effect holding rods 48 is in the 1 just another staff 48 for the sake of simplicity, with its lower terminal end shown, the extent of the underside of the bottom part 46 protrudes. In this area is the respective holding bar 48 via a threaded nut 50 bolted and the upper end of the respective holding rod 48 is via a corresponding internal thread in the flange-like widening 42 stationary screwed. Such can under a predetermined bias the housing wall 44 between broadening 42 and bottom part 46 be determined.

So the case 40 in the upper tank wall 12 can be used is in this a corresponding circular cylindrical recess 52 introduced, whose diameter is in any case greater than the outer diameter in the region of the transition between the flange-like widening 42 and the outer periphery of the housing wall 44 , Furthermore, a cover part 54 as part of the filter device available with a handle 56 for easier installation and removal of the filter device in the tank shown 10 , The lid part 54 has a heel-like broadening 58 on top of the receiving wall 14 stands up, and a paragraph of broadening 58 engages in the free inner diameter of the receiving wall 14 attached to the same one. For fluid sealing is used in this area an annular sealing element 60 conventional design. Diametrically to the longitudinal axis 26 are arranged opposite each other fixing screws 62 present, the fixing of the cover part 54 at the reception wall 14 serve. After loosening the screws 62 the filter device can be removed from the tank 10 Remove and reinstall in reverse order. The pertinent assembly operations are necessary if a used filter element 18 to exchange for a new element.

Concentric to the longitudinal axis 26 a magnetic bar passes 64 within the filter device, which in particular has the function of a permanent magnet and in the direction of the 1 seen with its upper end in the lid part 54 fixed, in particular screwed in there, and with its other opposite free end he reaches through the inside 32 of the filter element 18 , The pertinent magnetic bar 64 allows a separation of magnetizable metal components in the fluid to be filtered. Both magnetic bar 64 as well as bypass valve 28 are optional and not necessarily provided for the function of the filter device as a whole.

As the 1 further shows, takes the cylindrical housing wall 44 a predeterminable radial distance to the outer peripheral surface of the filter element 18 so that so far a fluid flow space 66 is formed. The pertinent fluid flow space 66 extends parallel to the outer peripheral surface of the filter element 18 , In particular, it extends in the axial longitudinal direction parallel to the longitudinal axis 26 the device between the top of the bottom part 46 and the bottom of the flange widening 42 , Further, the fluid flow space 66 outwardly substantially from the housing wall 44 limited and inwardly from the outer peripheral surface of the element material 20 in the form of the filter mat. If the jacket-shaped support tube 36 for the elemental material 20 is used, the pertinent outer peripheral surface forms the boundary for the fluid flow space 66 ,

In the embodiment of the 1 is a fluid level 68 inside the storage tank 10 drawn in, and the filter element 18 and hence the fluid flow space 66 are partially below the level 68 and partly above it. Depending on the inflowing fluid through the inlet channel 16 To be cleaned off fluid or the outflowing for the working hydraulics (not shown) required amount, the fluid level changes 68 opposite to the momentary position shown in the 1 , The fluid flow space 66 By the way, from its flow space forth to the penetration of the individual support rods 48 not impaired.

The embodiment of the 2 is compared to the embodiment of the 1 changed so far as that a compression spring 78 is provided, extending between the bottom of the cover part 54 and the housing 40 extends to fixed cover part 54 the housing 40 the filter device against the top of the upper tank wall 12 to press and thus the filter device inside the tank 10 to fix.

Like the others 2 shows, which at least partially an external view of the filter device according to the 1 concerns are in the housing wall 44 of the housing 40 window-like passageways 74 existing in two spaced-apart groups like a ring above each other and circumferentially encircling the housing wall 44 succeed. The two adjacent groups have the same axial distance from each other, and the individual passage openings 74 within a group also have the same distance dimensions to each other in the radial circumferential direction. As the representation after the 1 and 2 continue to show is at a given fluid level 68 the lower group of passages 74 The fluid level still partially covered, and the group above it ends above the level top and without interfering with them. In the present embodiment, within the housing wall 44 and on the inside thereof at least one sieve or grid structure layer 76 be arranged, which forms a continuous cylinder jacket and all identically formed window-like passage points 74 at the edge overlaps. Thus the respective structural position 76 on the inside of the housing wall 44 remains, this can be determined accordingly via a spot weld, not shown. In principle, there is also the possibility of the specified mesh structure in the housing wall 44 of the housing 40 einzustanzen so that in this respect the screen structure integral part of the housing wall 44 is. Furthermore, instead of a single structural layer 76 but basically also for each window opening as a passage point 74 this an independent grid, also multi-layered, exhibit. The choice of the free opening cross sections for the passages 74 the respective structural position 76 depends on ambient conditions, such as the viscosity of the fluid used, in particular in the form of hydraulic oil, which is ultimately also dependent on ambient temperature values. The shown window openings 74 as passages in the housing 40 respectively the housing wall 44 are preferably realized in a rectangular shape; however, other opening geometries would also be possible to that extent.

Now take the filter device after the 1 and 2 In operation, fluid flows through the mat-shaped element material 20 from the inside to the outside and is thereby cleaned. As part of the tank 10 stored fluid, which is below the level 68 is located in the lower passageways 74 flows in, so far below the level 68 located inflow space 66 with fluid that follows more from the inside 32 hereafter flowing fluid is displaced upward, so that a film-like hollow column in the fluid flow space 66 created with fluid, which is located on the inside of the housing wall 44 applies, as well as at the passage points of the extent perforated screen or lattice structure 76 , The highly ascending fluid arrangement above the fluid level 68 passes through the passage openings in the window-like passage points 74 from what is largely laminar and spray or foaming operations during the passage are so far avoided with certainty. Depending on the occurring fluid quantities and the fluid pressure, as they are on the fluid inlet in the inlet channel 16 can result in the laminar fluid leakage in the area of the fluid level 68 take place or correspondingly overlying. Depending on the volume size for the fluid flow space 66 can with correspondingly narrow radial design, so with a small radial distance measure, to the outside of the filter element 18 for the upward movement, a supporting capillary effect with adjust.

Depending on the mesh size for the structural layer 76 The free opening cross-sections for the passage openings can be selected such that any gas bubbles present in the cleaned fluid, such as air bubbles, at the thus perforated structure layer 76 depositing, wherein for a fluid-level release of the gas, the bubbles on the structure layer 76 and increased in volume for ease of delivery under the influence of their surface tension, which equates to a coalescence effect. Thus, they bubbled up the CO ₂ beads in a carbonated beverage from the filter device upwards so that so far the fluid in the tank 10 is effectively degassed. Since hydraulic work equipment is often sensitive to such gas entry, so far the pertinent risk of interference has already met.

In order to further improve the gas bubble discharge from the fluid, it is provided according to the invention that at least part of the passage openings 37 in the support tube 36 of the filter element 18 a flow guide 80 , which give the fluid a flow direction, that of the previously described radial flow direction of the fluid from the inside to the outside through the filter element 18 is different.

As in particular the representation after the 3 to 5 for an embodiment of a support tube designed in this way 36 show, allows the respective flow guide 80 the fluid passing through the support tube 36 passes, a flow direction in the manner of a swirling flow around the support tube 36 around. As shown by the 3 to 5 have all Strömungsleiteinrichtungen 80 with their free opening cross sections 82 that only in the 3 can be seen in a common direction, resulting in a helical swirl flow for the passage fluid. As can be seen in particular from the presentation after the 4 and 5 results limited the respective flow guide 80 of the support tube 36 a free opening cross-section 82 , opposite the longitudinal axis 26 of the filter element is inclined by an angle α of preferably 45 °. Other inclination settings between 30 ° to 60 ° but would also be possible in order in such a way in a predetermined frame the course of the swirl flow to the filter element 18 to be able to adjust.

Like the others 3 shows, is the respective flow guide 80 from the jacket material of the support tube 36 outwardly protruding as a flow pocket 84 formed, except for their free opening cross-section 82 on its upper side integrally merges into the support tube element material. The current flow pocket 84 can from the support tube shell 85 (see. 6 . 6a . 6b ) pronounced from the inside out, cut out or preferably punched out. The punching process can take place in such a way that virtually by itself when forming the flow pocket 84 this in the upper part of the support tube shell material 85 tears off, and then the slot-like opening cross-section 82 with its peripheral edge releases, with the support tube 36 out the bag 84 from the overlying jacket material 85 of the support tube 36 is limited. As can be seen from the presentation after the 3 to 5 results in terms of the inclination of the respective flow pocket 84 from left bottom to top right by the angle α of 45 ° with respect to the vertical a swirling flow, which is clockwise around the filter element 18 is led around.

In addition to the respective respective flow guide 80 has the support tube 36 further passage openings 37 on, the groups of the respective flow guide 80 include, wherein the sum of the free opening cross-sections 82 of flow guides 80 smaller than the other passage openings 37 in the support tube 36 is. The pertinent conditions arise in particular from the partial drawing after the 5 , The further passage openings 37 in the support tube 36 are formed in the form of a perforation, which, in departure from the solution after the 2 in the prior art does not consist of circular passage openings, but like the 5 shows are designed rectangular. The pertinent passage openings 37 of the support tube 36 make sure that in filtering the device it is not unintentional by a self-contained support tube surface to increase the resistance on the output side of the element material 20 comes, which would eventually restrict the filtration operation with the pleated filter mat. The 5 further shows how the cylindrical support tube shell 36 with the upper end cap 22 connected, in particular crimped.

Like the others 4 shows are the flow guides 80 in the support tube 36 arranged in groups at the same height to each other and with constant predeterminable distances around the support tube 36 Grouped around.

That in the 3 and 4 as a replacement element shown filter element 18 thus indicates that between the two end caps 22 . 24 extending elemental material 20 on, as already stated, from the support tube 36 with passage openings 37 is included. At least part of these openings 37 in the support tube 36 of the filter element 18 has the flow guide 80 on, which gives the fluid a flow direction, that of the radial flow direction through the element material 20 is different from inside to outside. If the pertinent filter element particulate accordingly polluted, it can, as already for the 1 shown, replace in a simple manner against a corresponding new element.

The following embodiment according to the 6 . 6a . 6b and 7 is only explained insofar as it is substantially different from the previous embodiment of a support tube 36 with flow guides 80 different. In the embodiment of the 6 are the opening cross sections 82 the individual flow guides 80 inclined in the other direction, ie they extend at an angle α by 45 ° relative to the longitudinal axis 26 of the filter element 18 inclined, looking in the direction of 6 and 7 seen from top left to bottom right. Furthermore, the support tube 36 as shown in the 6 reproduced in his developed situation as a flat sheet metal blank, which rolled up according to a circular cylinder with its two opposite longitudinal edges 86 . 88 a common longitudinal weld seam 90 forms.

Furthermore, the show 6a . 6b along the arrows X and Y frontal views of the unwound support tube 36 in the form of his flat coat 85 , In particular, this will be the pocket design for the individual Strömungsleiteinrichtungen 80 visible in the support tube shell. Due to the opposite orientation of the opening cross sections 82 for the flow guide 80 Thus, the swirl flow takes place in the counterclockwise direction around the filter element 18 seen in the longitudinal direction of the same around. Depending on how you can control the flow resistance within the support tube shell 85 To design, you can also more pocket-like flow control 80 provide, and the number of radial passages 71 reduce in the sense of a perforation.

The flow pockets 84 in the manner of protruding gills on the support tube 36 respectively the flow guiding devices 80 can be uniform over the entire outer circumference of the support tube as stated above 36 be distributed. However, there is the possibility in non-illustrated embodiments, the pertinent flow pockets 84 over the circumference of the support tube 36 to distribute in a different order. For example, the flow pockets could 84 in the manner of a cluster arrangement around the support tube 36 be grouped around. It has proved to be particularly advantageous for the flow pockets 84 respectively the flow guiding device 80 below the expected fluid level within the storage tank on the support tube 36 to arrange. The gill-like flow guiding devices are then preferred 80 along with the flow pockets 84 in the direction of the 1 to 4 seen in the lower third of the support tube 36 arranged exclusively, and otherwise is the support tube 36 vollmantelig trained or just with the passage openings already described 37 provided in rectangular or other polygonal shape and circular or elliptical.

Due to the set swirl flow over the respective flow guide of the support tube passes in a guided manner, the fluid with the air inlet on the cylindrically shaped fluid flow space 66 to the window-like passage points 74 in the case 40 which is the support tube 36 surrounds what then in a surprising way to an increased gas discharge at the window-like passage points 74 of the housing 40 leads due to the higher energy input of Swirl flow into the fluid to be carried. The gill-like upward in the direction of the fluid level 68 above flow guides 80 allow a direct discharge of the aerated fluid or oil in the direction of the fluid level 68 and beyond, which further promotes the air discharge. This has no equivalent in the prior art.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2249941 B1 [0004, 0022]
• EP 1419807 B1 [0022]

Claims (10)

Filter device, in particular intended for installation in a fluid storage tank ( 10 ) with at least one, preferably exchangeable filter element ( 18 ), whose element material ( 20 ) can be flowed through in the radial direction from the inside to the outside by a fluid which from a passage openings ( 37 ) having support tube ( 36 ), each maintaining a predeterminable radial distance and forming a fluid flow space (US Pat. 66 ) of a housing wall ( 44 ) of a housing ( 10 ), which has several passages ( 74 ), characterized in that at least a part of the passage openings ( 37 ) in the support tube ( 36 ) of the filter element ( 18 ) a flow guiding device ( 80 ), which give the fluid a flow direction that is different from the radial flow direction. Filter device according to claim 1, characterized in that the flow guiding device ( 80 ) the fluid passing through the support tube ( 36 ), a flow direction in the manner of a swirl flow around the support tube ( 36 ) around. Filter device according to claim 1 or 2, characterized in that the swirl flow is directed counterclockwise. Filter device according to one of the preceding claims, characterized in that all flow guiding devices ( 80 ) with their free opening cross sections ( 82 ) in a common direction. Filter device according to one of the preceding claims, characterized in that the respective flow guiding device ( 80 ) of the support tube ( 36 ) has a free opening cross-section ( 82 ), which is inclined with respect to the longitudinal axis of the filter element by an angle α of 30 ° to 60 °, preferably by 45 °. Filter device according to one of the preceding claims, characterized in that the respective flow guiding device ( 80 ) made of the material of the support tube ( 36 ) outwardly protruding as a flow pocket ( 84 ) is formed, the upper edge of the opening cross section ( 82 ) for the fluid delivery of the flow guide ( 80 ) limited. Filter device according to one of the preceding claims, characterized in that the flow guiding device ( 80 ) forming the flow pocket ( 84 ) from the support tube shell ( 85 ) pronounced or punched from the inside out. Filter device according to one of the preceding claims, characterized in that in addition to the respective flow guiding device ( 80 ) the support tube ( 36 ) further passage openings ( 37 ), which in groups the respective flow guide ( 80 ), and that the sum of the free opening cross-sections ( 82 ) of flow guiding devices ( 80 ) and passage openings ( 37 ) correspond to each other or that the sum of the free opening cross sections ( 82 ) of the flow guiding devices ( 80 ) smaller than the passage openings ( 37 ) in the support tube ( 36 ). Filter device according to one of the preceding claims, characterized in that the flow guiding devices ( 80 ) in the support tube ( 36 ) in each case the same altitude and with constant predeterminable distances around the support tube ( 36 ) are grouped around. Filter element ( 18 ) with one between two end caps ( 22 . 24 ) extending elemental material ( 20 ), by a support tube ( 36 ) with passage openings ( 37 ), characterized in that at least a part of the passage openings ( 37 ) in the support tube ( 36 ) of the filter element ( 18 ) a flow guiding device ( 80 ), which provide the fluid with a flow direction that extends from the radial flow direction through the element material ( 20 ) is different.

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